Disk-harrow attachment



April 3, 1928. 4'

H. J. ONEIL DISK HARROW ATTACHMENT Filed Sept. 8. 1925 IQ IACVENTOR M 'A TTORNE r row attachment, the chief Fatented Apr. 3, 1928.

PATENT OFFIEE.

HENRY J. ONEIL, OF TAMPICO, ILLINOIS:

DISK-HARROW ATTACHMENT.

Application filed September 8, 1925. Serial No. 55,074.

My invention has reference to a disk harurpose thereof being to provide a device w ich will break up the larger clods and chunks of earth which are frequently left in the rear of the machine, and which have to be pulverized in some way before the ground is ready for use. In fall plowing and cultivating especially there are large chunks of earth which pass readily through the spaces between the disks.

Another object of the invention is to give additional weight to the harrow section to which it is attached, to overcome any tendency of the clods to lift the section, so as to pass over such clods without breaking them up.

Another purpose of the invention is to form the attachment in such a manner that it can be readily placed in position on the machine, without having to dissemble the machine, or any part thereof.

In the drawings,-

Fig. 1 shows a fragmentary portion of a disk harrow section with the invention applied thereto.

Fig. 2 is a face view of one of the attachments, and disk in rear thereof.

Fig. 3 is a fragmentary longitudinal section through two of the split points of the invention.

The reference number 1 indicates a portion of one of the section frames of a disk harrow, and 2 one of the supports for a shaft 3, upon which is mounted a series of disks 4, spaced apart in the usual manner by spools 5, strung on the shaft 3. Fixed to said spools in the clear spaces between the disks are star-shaped breakers 6, each formed of half-sections 6 and'7, each of which is provided with two half-points se cured together by means of bolts 8 passing through openings in said points. The central part of the breaker is provided with a recess 9, for engagement with the shaft 5, such recess being formed partly in each of the sections 6 and 7, and being of a shape to accommodate itself to spools of varying diameters.

The head end of the bolt 8 is preferably provided with a squared portion 10, enga ed in an elongated opening 11 in the point of the part 6 in which it is held, and

the points can be drawn toward each other by means of a nut 12 on the threaded end of the bolt. The opening 11 not only holds the head of the bolt from turning, but it permits a longitudinal adjustment of the parts 6 and 7 with reference to each other, so that the spool 5 will be properly engaged thereby. When the nuts on the bolts 8 are properly tightened a rotary movement of the breaker wheel will result, when the harrow is in operation.

The sections 6 and 7 are formed of cast metal, adding a number of pounds to the weight of the section to which they are attached, so as to hold the breaker wheels to their work when clods are encountered thereby. The'points of said wheels entering the clods, and the pressure of the wheels thereon operates to thoroughly break them By forming the wheels in two parts they can be readily placed in position on the spools, when separated, and secured in place thereon. They can also be'adapted to spools of different diameters, such as are frequently found in machines of different makes, the shape of the hole 9 assisting in this adaptation, as before mentioned. In some kinds of disk harrow work the breakers would not be needed, and they can beas readily detached from the harrow. It will also be noted that the parts of the breaker wheel are identical, and that they will be easily interchangeable. Only one pattern is required for both of said parts. The ends of the wheels are inclined to some extent, to conform with the shape of the disks.

What I claim, and desire to secure by Letters Patent, is:

A device of the class described, con1prising a star-shaped Wheel formed of two similar sections, provided with complementary recesses adapted to receive the shaft of a disk harrow, two oppositely disposed points of the wheel being split longitudinally and transversely of the points, and fastening means passing through said split points adapted to detachably connect said sections with a disk harrow shaft, for rotation therewith.

In testimony whereof I aflix my signature.

HENRY J ONEIL, 

